JPH0565468B1 - - Google Patents
Info
- Publication number
- JPH0565468B1 JPH0565468B1 JP60235971A JP23597185A JPH0565468B1 JP H0565468 B1 JPH0565468 B1 JP H0565468B1 JP 60235971 A JP60235971 A JP 60235971A JP 23597185 A JP23597185 A JP 23597185A JP H0565468 B1 JPH0565468 B1 JP H0565468B1
- Authority
- JP
- Japan
- Prior art keywords
- fired
- firing
- clay
- molded body
- zeolite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010304 firing Methods 0.000 claims description 16
- 239000004927 clay Substances 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000005187 foaming Methods 0.000 claims description 5
- 238000004898 kneading Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 229910021536 Zeolite Inorganic materials 0.000 claims description 4
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 239000010457 zeolite Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 229910001562 pearlite Inorganic materials 0.000 claims description 2
- 239000010451 perlite Substances 0.000 claims description 2
- 235000019362 perlite Nutrition 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims 1
- 238000005245 sintering Methods 0.000 claims 1
- 238000001035 drying Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000751119 Mila <angiosperm> Species 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Description
本発明は、セラミツク成形体の製造方法に関す
る。
The present invention relates to a method for manufacturing a ceramic molded body.
一般にセラミツク成形体の製造方法としては粘
土生地の混練、生地の状態での成形、乾燥、焼成
という肯定を経るのが普通である。この際生地の
ままの形態での成形は粘土生地が軟体であるため
成形加工が容易であり複雑な形状のものまでも成
形できる。
Generally, the manufacturing method for ceramic molded bodies usually involves kneading clay dough, shaping the dough, drying it, and firing it. At this time, molding the dough as it is is easy because the clay dough is soft, and even complex shapes can be molded.
【発明が解決しようとする課題】
しかし、最終成形製品を得るには乾燥、焼成と
いう必須な工程を経るため収縮という現象を避け
ることができず、素地の原料組成の配合割合や均
一度あるいは成形の方法、または乾燥の方法によ
り変形や割れ、または亀裂の発生という悪現象が
出易く、温度の過激な上昇等も特に避ける必要が
ありこのため焼上りまでには長時間を要してい
た。したがつてセラミツク体の大型化、連続製造
化は困難とされていた。[Problems to be Solved by the Invention] However, in order to obtain the final molded product, it is impossible to avoid the phenomenon of shrinkage due to the essential steps of drying and firing. or the drying method, deformation, cracking, or cracking is likely to occur, and it is also necessary to avoid extreme increases in temperature, which requires a long time to bake. Therefore, it has been difficult to increase the size and continuous production of ceramic bodies.
本発明は、焼成の欠点とされている収縮に対し
てこれを防ぐためゼオライト、パーライト、ミラ
ス等の発泡物質を配合し、この発泡物質の発泡に
よつて焼成による収縮歪を是正するものである。
そしてこの成形を焼成炉中で被焼成材が熱軟化の
状態にあるときに行うものであつて、本発明の意
図するような外壁用セラミツクサイデイング板の
如く比較的単純な形状、例えば細幅の長尺体の両
縁部を折曲させて接合部を有するように箱型とす
るような場合の成形において特に顕著な作用効果
を奏する。
In the present invention, a foaming material such as zeolite, pearlite, milas, etc. is blended to prevent shrinkage, which is considered to be a disadvantage of firing, and the shrinkage distortion caused by firing is corrected by foaming the foamed material. .
This shaping is performed when the material to be fired is in a thermally softened state in a firing furnace, and is formed into a relatively simple shape, such as a narrow width ceramic siding board for an exterior wall as intended by the present invention. Particularly remarkable effects are achieved in forming a long body into a box shape with a joint by bending both edges thereof.
本発明方法においては、土練機から連続的に帯
状に成形押出される生地帯を、一々切断して所望
の形状に成形加工することなく乾燥炉からトンネ
ル型の焼成炉に送り、乾燥、焼成予熱の工程を経
て生地が十分熱収縮を起こした際に本焼成に移行
し、焼成炉内で被焼成材が熱軟化の状態にあると
きに成形加工を行い、徐冷を経て規定寸法に裁断
して製品を得るものである。
In the method of the present invention, the dough that is continuously extruded into strips from the kneading machine is sent from the drying furnace to the tunnel-shaped firing furnace, where it is dried and fired without being individually cut and shaped into the desired shape. When the dough undergoes sufficient heat shrinkage after the preheating process, it moves on to the main firing, and while the material to be fired is in a thermally softened state in the firing furnace, it is shaped, slowly cooled, and then cut into specified dimensions. to obtain the product.
従来乾燥、焼成という熱変化による収縮・変態
の現象を少しでも防ぐため長時間かけて徐々に温
度を上昇させて乾燥・焼成という工程を経過させ
ていたため焼上り製品化までには丸二日程の長時
間を要していたが、本発明方法によるときは、乾
燥、予熱で生地材が熱による収縮が十分になされ
た時点で本焼成に移行するため軟化時の成形が容
易にでき、しかも徐冷を経た焼上り製品は規定寸
法に仕上り変形歪が見られないという好効果が得
られ連続成形を可能にする。
又上記については土練機により混練押出された
生地体を使用したが、粘土原料を粉体のまま焼成
した場合にも焼成炉中で高温により軟化焼結して
成形が可能であり、また熱収縮による変形歪を防
ぐために粘土原料中に歪を収縮する目的で発泡物
質としてゼオライト、パーライト、シラス等の混
入は有効であり、さらに発泡剤、例えば、Na2
CO3、NaNO3、カーボン、Al等を混入して成形
することもできる。
本発明方法においては具体的にはトンネル型の
焼成炉内では予熱部と本焼成区分と徐冷部に温度
区分が分かれており、予熱部では600℃に本焼成
では900〜1300℃で焼成が行われており、本焼成
の区分で900〜1300℃に温度が上昇すると被焼成
物は白光を発して軟化状態となる。このとき、こ
の軟化を利用し加工を行うものであつて、加工に
は2000℃の高温に耐える窒化ケイ素やニユーセラ
ミツク材製のローラー又は冷却機構を有する金属
ローラーによつて縁部の折曲をロールフオーミン
グプレス加工で行うものである。
Conventionally, in order to prevent shrinkage and transformation due to thermal changes during drying and firing, the temperature was gradually raised over a long period of time to complete the drying and firing process, which took two full days to produce a finished product. However, when using the method of the present invention, the main baking begins when the dough material has sufficiently shrunk due to heat during drying and preheating, making it easier to shape the material when it is softened. The baked product that has been cooled has the advantage of being finished to specified dimensions without any deformation distortion, making continuous molding possible. In addition, in the above case, a dough body kneaded and extruded using a clay kneading machine was used, but even if the clay raw material is fired as a powder, it can be softened and sintered at high temperature in a kiln, and it can also be shaped using heat. It is effective to mix zeolite, perlite, shirasu, etc. as a foaming substance for the purpose of shrinking the distortion in the clay raw material in order to prevent deformation distortion due to shrinkage .
It can also be molded by mixing CO 3 , NaNO 3 , carbon, Al, etc. Specifically, in the method of the present invention, the temperature in the tunnel-type firing furnace is divided into a preheating section, a main firing section, and a slow cooling section. When the temperature rises to 900 to 1300°C during the main firing stage, the object to be fired emits white light and becomes soft. At this time, processing is performed using this softening, and the edges are bent using rollers made of silicon nitride or new ceramic materials that can withstand high temperatures of 2000°C, or metal rollers with a cooling mechanism. This is done by roll forming press processing.
本発明の製造方法によるときは、土練機から押
出される帯状生地体をローラーコンベアー上を移
送させながら、乾燥、焼成（成形を含む）を連続
的に行うことができるばかりでなく粉末体を焼結
成形することもできるもので、セラミツク成形体
の製造上新規な成形法であつて大量生産を向くと
いう効果を奏する。
When using the manufacturing method of the present invention, not only can drying and baking (including shaping) be performed continuously while the belt-shaped dough extruded from the kneading machine is transferred on a roller conveyor, but also the powder can be It can also be sintered and formed, which is a new forming method for producing ceramic molded bodies and has the effect of being suitable for mass production.
Claims (1)
ラス等の発泡物質を混入配合した原料を土練機で
混練して押出成形し、乾燥焼成し、該焼成炉内で
被焼成体の軟化を利用して任意形状に成形するこ
とにより、焼成による成形体の収縮歪みを無くす
ることを特徴としたセラミツク成形体の製造方
法。 ２ 原料粘土に別にゼオライト、パーライト、シ
ラス等の発泡物質を混入配合した原料を粉体のま
ま焼成炉に送付し、該焼成炉内で被焼成体の軟化
焼結を利用して任意形状に成形することを特徴と
した特許請求の範囲１に記載のセラミツク成形体
の製造方法。[Scope of Claims] 1 A raw material prepared by separately mixing and blending foaming substances such as zeolite, perlite, and shirasu with raw clay is kneaded in a clay kneading machine, extrusion molded, dried and fired, and in the firing furnace the object to be fired is A method for manufacturing a ceramic molded body, characterized by eliminating shrinkage distortion of the molded body due to firing by molding into an arbitrary shape using softening. 2 Raw materials made by separately mixing and blending foaming substances such as zeolite, pearlite, and shirasu with raw clay are sent as powder to a firing furnace, where they are molded into arbitrary shapes using softening and sintering of the object to be fired. A method for producing a ceramic molded body according to claim 1, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60235971A JPS62096370A (en) | 1985-10-21 | 1985-10-21 | Manufacture of ceramic formed body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60235971A JPS62096370A (en) | 1985-10-21 | 1985-10-21 | Manufacture of ceramic formed body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62096370A JPS62096370A (en) | 1987-05-02 |
| JPH0565468B1 true JPH0565468B1 (en) | 1993-09-17 |
Family
ID=16993915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60235971A Pending JPS62096370A (en) | 1985-10-21 | 1985-10-21 | Manufacture of ceramic formed body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62096370A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3610528A1 (en) * | 1985-06-14 | 1986-12-18 | Agency of Industrial Science & Technology, Ministry of International Trade & Industry, Tokio/Tokyo | METHOD FOR SUPERPLASTIC MOLDING OF CERAMIC MATERIAL |
-
1985
- 1985-10-21 JP JP60235971A patent/JPS62096370A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62096370A (en) | 1987-05-02 |
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